Members of the Stop the F-35 Coaliton gathered in Burlington's City Hall Park around 11 a.m. and warned bystanders of a loud demonstration.

They then blared what they said is the recording of an F-35 taking off from a Texas facility. Some grimaced as close to 115 decibels played for six minutes. The group said it was were simulating what people will be exposed to if the F-35s are based in Burlington.

"You're making so much noise, you're vibrating the stuff on my walls," said a very angry David Harrison. He lives across the street and wasn"t pleased with the presentation. "You wouldn't appreciate if you had this going on at your house," he said.

"It's really extreme, a really, really extreme sound. It's very piercing. Yeah, it's awful," said Cordelia McKusick, who was visiting the state capital with her friend

Some found it less troubling.

"I could still hear the music in my Bluetooth throughout the duration of the sound," said Peggy Lord.

The demos were held outside the offices of the Vermont governor and Burlington mayor, though neither were there.

"The governor is not here today. He had not planned to be here," said Jeb Spaulding, secretary of Gov. Peter Shumlin's administration. Spaulding told coalition members the noise recording didn't sway his support for the F-35.

"We're talking about a few minutes a day, a few times a week," he said, in reference to how often the Air Force has said it plans to fly the planes if they came to Burlington. "The F-35s are critical to the long-term viability of the Vermont Guard, and if those planes are going to fly, they are an important part of our economy and I think Vermonters recognize that," he said.

Leaders of the Vermont Air National Guard have said they have ideas in mind to mitigate the amount of noise the plane produces.